/*
 * Copyright 2014 CITIUS <http://citius.usc.es>, University of Santiago de Compostela.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package es.usc.citius.hipster.graph;


/**
 * Hipster graph edge implementation to represent edges (or arcs) of a directed or
 * undirected graph.
 *
 * @param <V> vertex type.
 * @param <E> edge type.
 */
public interface GraphEdge<V,E> {
    enum Type { DIRECTED, UNDIRECTED }

    V getVertex1();
    V getVertex2();
    E getEdgeValue();
    Type getType();

//    @Override
//    public String toString() {
//        return getVertex1() + " ---(" + edgeValue + ")---" + (isDirected() ? "> " : " ") + getVertex2();
//    }
}
